<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      Object.assign2 = function (target, ...source) {
        // target 目标对象
        let res = Object(target);
        source.forEach((obj) => {
          if (obj != null) {
            // 遍历
            for (let key in obj) {
              if (obj.hasOwnProperty(key)) {
                res[key] = obj[key];
              }
            }
          }
        });
        return res;
      };
    </script>
  </body>
</html>
